were sheltering under that roof. yet an air strike hit that building. ukrainian officials say hundreds were inside as russian bombs fell on the city. at least 100 have been rescued but hundreds more are still missing. after news of the attack, president biden made his strongest condemnation of vladimir putin calling him a war criminal. secretary of state antony blinken followed up calling him a war criminal. but there's a specific set of proses for calling something a war crime. it's known as the rules of armed conflict also known as international humanitarian law. it's a branch of law that seeks to limit the effects of armed